Lew is is Driv ive Rel eleas ease e Si Sit e / Plan ant at - - PowerPoint PPT Presentation

Lew is is Driv ive Rel eleas ease e Si Sit e / Plan ant at at ion Pipel eline e Rel eleas ease Belt on, SC

November 30, 2016 Donald L. Siron, P .G. Assistant Bureau Chief Bureau of Land and Waste Management

Location

Release discovered December 8, 2014 approximately 1.5 miles northwest of Belton, SC. Caller reported odor and dead vegetation in a ditch near the pipeline along Lewis Drive just north of Calhoun Road.

Background Inform ation

Plantation Pipeline estimates 369,600 gallons of gasoline and diesel (mostly gasoline) released to the environment. The pipeline was repaired and Lewis Drive was reopened to traffic the week

• f December 19, 2014.

Initial Actions

Actions performed in attempt to recover petroleum product, prevent contamination from reaching Brown’s Creek and Cupboard Creek, and stop contamination from moving downstream in Brown’s Creek:

• 2,800 tons of contaminated soil was

removed from the site.

• 98 temporary monitoring wells were

installed initially to locate petroleum product and determine the extent of groundwater contamination.

• 20 product recovery sumps
• 15 product recovery wells
• Product recovery trench up-gradient of

Brown’s Creek

• 7 hard impermeable booms and 10

soft absorbent booms in Brown’s Creek

Release Status

209,085 gallons of product recovered via routine vacuum extraction. Free product gauging and recovery conducted weekly. Petroleum contamination is present in groundwater and Brown’s Creek.

Project Status

Plantation Pipeline’s Corrective Action Plan (CAP) is currently under review. Product recovery, air sparging and diffusion aeration proposed to address contamination at the site. Public comment period for CAP ends on December 6, 2016. Installation of remediation system is underway (horizontal wells, etc.) The CAP predicts surface water contamination should be abated within a few months of system startup. Operation of the groundwater remedial system is anticipated for 10+ years.

Four Key Areas Addressed: Brown’ s Creek Cupboard Creek Hayfield Area Form er Private Hom e Property Rem ediation Methods: Air Sparging Technology Free Product Rem oval Diffusion Aeration

Correct iv ive Act io ion Pla lan Det ails ils

DHEC’s Role e in t he e Rem emed ediat ion Proces ess

• Prevent or min

inim imiz ize pot ent ia ial l for exposur ure t t o cont nt amina nant nt s.

• Review asse

ssessm ssment dat a and find nding ngs t t o det ermine ne i if t t he he na nat ur ure and nd ext ent nt of t he he cont nt amina nat ion n has been een def efined ed.

• Evaluat e

e CAP t o make e sure e t he e pr propo posed d remedy dy is appr ppropr priat e.

• Cont

nt inue nued review and nd oversight ht t o en ensure e rem emed ediat ion is moving t owar ard c clean anup goal als t t hat at ar are prot ect ive o

• f hum

human n he healt h a h and nd t he he env nvironm nment nt .

Path Forw ard

• Continued oversight of

product removal, installation and

• peration of

groundwater remediation system and monitoring efforts at the site.

• Routine quarterly

meetings and frequent telephone conferences with Plantation Pipeline representatives and consultants.

Bureau of Land and Waste Management 2600 Bull Street Colum bia, SC 29201 (803) 898-2000